循环流化床NOx和SO_(2)协同脱除技术试验研究  

High-efficiency Synergistic Removal Technology of NOx and SO_(2) in Circulating Fluidized Bed Combustion

作　　者：王超 宋国良[2,3,4] 吕清刚 WANG Chao;SONG Guoliang;LYU Qinggang(School of Engineering Science,University of Science&Technology of China,Hefei 230026,Anhui,China;Institute of Engineering Thermophysics,Chinese Academy of Science,Beijing 100190,China;School of Engineering Science,University of Chinese Academy of Science,Beijing 100049,China;Dalian National Laboratory for Clean Energy,Dalian 116023,Liaoning,China)

机构地区：[1]中国科学技术大学工程科学学院,安徽合肥230026 [2]中国科学院工程热物理研究所,北京100190 [3]中国科学院大学工程科学学院,北京100049 [4]中国科学院洁净能源创新研究院,辽宁大连116023

出　　处：《工业锅炉》2024年第2期1-6,41,共7页Industrial Boilers

摘　　要：结合循环流化床后燃技术(简称“后燃技术”)和炉内喷钙脱硫技术,在0.1 MW循环流化床试验台上研究了循环流化床NOx和SO_(2)协同脱除潜力,主要研究了后燃室脱硫剂添加量对NOx和SO_(2)排放影响以及炉内添加脱硫剂时燃烧温度对NOx和SO_(2)排放的影响。结果表明:通过后燃室注入脱硫剂可以降低SO_(2)排放,能够达到一定的脱硫效果。当燃烧温度较高时,后燃技术下炉内添加脱硫剂,脱硫效果很差。通过适当降低燃烧温度可以实现NOx和SO_(2)的协同脱除。当温度为845℃时,后燃技术下炉内脱硫时可直接实现超低NOx排放,而SO_(2)排放可以降至92.09 mg/m^(3)。后燃技术下炉内低温脱硫时,如果后燃室添加适量脱硫剂,则SO_(2)排放可进一步降低,有望实现NOx和SO_(2)双超低排放,进一步降低循环流化床污染物脱除成本。Combined with circulating fluidized bed post-combustion technology(abbreviated as"post-combustion technology")and furnace sorbent injection technology,the potential of synergistic control of the emissions of NOx and SO_(2) was explored in a 0.1 MW circulating fluidized bed test platform by studying effects of amount of sorbent added in postcombustion chamber on NOx and SO_(2) emissions and effects of temperature on NOx and SO_(2) emission with sorbent addition in furnace under post-combustion technology.The experimental results showed that under post-combustion technology,injec￣ting absorbent in post-combustion chamber can reduce SO_(2) emissions and achieve a certain desulfurization effect.High-ef￣ficiency synergistic removal of NOx and SO_(2) can be realized by reducing the temperature in the CFB furnace with sorbent ad￣dition in the boiler under post-combustion.When combustion temperature is 845℃,the ultra-low NOx emission with sor￣bent addition in the boiler under post-combustion can be achieved,and the SO_(2) emission can be reduced to 92.09 mg/m^(3).The SO_(2) emission can be decreased further,and expected to realize the ultra-low SO_(2) emission when calcined lime is injec￣ted into post-combustion chamber.

关 键 词：循环流化床 后燃技术 NOx SO_(2) 协同脱除 

分 类 号：X511[环境科学与工程—环境工程] X701.3